Here is also something to take note of. I redeemed the Assassins Creed 2 and Brotherhood "Discount Voucher" that was in my copy of Revelations back when it came out that entitles you to a discount on these titles. Back in February 2013 when these 2 games went down to €9.99 or some sort of sale price, this translated into Free for me on PS Plus and I was able to add both to my download list :D